Home / 1,401.63-2,103.21-621.78

Finding the Fourth Proportional to 1,401.63, 2,103.21 and 621.78

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Solution

The fourth proportional to 1,401.63, 2,103.21 and 621.78 is: 933.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.63 : 2,103.21 = 621.78 : x
  2. Step 2: Convert to fraction form
    1,401.63/2,103.21 = 621.78/x
  3. Step 3: Cross multiply
    1,401.63x = 2,103.21 × 621.78
  4. Step 4: Simplify right side
    1,401.63x = 1,307,733.91
  5. Step 5: Solve for x
    x = 1,307,733.91/1,401.63
  6. Step 6: Final answer
    x = 933.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.